Spectral analysis has been found to be an effective and cost-effective method of sorting macadamia nuts. Image Source: Flickr user Jessica Merz
Similarly, NIR spectrophotometry has been found capable of detecting common nut defects caused by insect damage, germination, and mold growth in other types of shelled and de-shelled nuts. After visual assessment of these quality parameters was determined to be insufficient, a group of Brazilian researchers sought to investigate the feasibility of spectrophotometric analysis in identifying compromised in-shell macadamia nuts. They discovered that spectral data provided an extraordinarily accurate basis for intact macadamia nut sorting and noted that “this technique can be used as a non-destructive method and could be a valid and simple tool to reduce the quality control costs of monitoring macadamia nuts’ quality.”2 Spectral analysis is also considered a reliable method of identifying damaged pistachio hulls associated with contaminants such as insect pupae, fungal decay, and navel orange worm with 96.3% accuracy, facilitating segregation of defective product. As the functional and economic benefits of optical sorting systems using spectral analysis become more apparent, nut product manufacturers are increasingly integrating spectrophotometric instrumentation for raw nut evaluation and classification purposes, allowing for greater quality control throughout the production chain.
HunterLab Instrumentation
As a pioneer in the field of spectral analysis, HunterLab offers the most advanced spectrophotometric instruments available to assess raw and processed nuts, both with and without shells, with accuracy and ease. Our revolutionary range of benchtop and in-line spectrophotometers with integrated height measurement capabilities are ideally suited for the evaluation of nut quality at every stage of sorting, cooking, and treating to optimize efficiency and allow for segregation of undesirable product within your chosen parameters. This advanced spectral technology is instrumental in the development of automated optical sorting systems that not only safeguard consumer health, but create opportunities for significant cost-savings. Contact us to learn more about what HunterLab has to offer and how we can help you bring nut analysis to new heights.